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DS: Fachverband Dünne Schichten

DS 35: Poster I: Application of thin films; Focus session: Sensoric micro and nano-systems; Focus Session: Sustainable photovoltaics with earth abundant materials; Graphen (joint session with TT; MA; HL; DY; O); Ion and electron beam induced processes; Layer properties: electrical, optical, and mechanical properties; Magnetic/organic interfaces, spins in organics and molecular magnetism; Micro- and nanopatterning (jointly with O); Organic electronics and photovoltaics (jointly with CPP, HL, O); Thermoelectric materials

DS 35.61: Poster

Wednesday, April 2, 2014, 17:00–20:00, P1

Impact of PC[60]BM on the Photo-Degradation of PCPDTBT — •Ulf Dettinger¹, Heiko Peisert¹, Hans-Joachim Egelhaaf², and Thomas Chassé¹ — ¹Eberhard-Karls-University, Institute for Physical and Theoretical Chemistry, Auf der Morgenstelle 18, D-72076 Tübingen, Germany — ²Belectric OPV GmbH, Landgrabenstr. 94, D-90443 Nürnberg, Germany

Organic photovoltaic (OPV) offer a promising low-cost technology for the increasing energy demand of the future. Although higher device efficiencies are still required, the stability of the device materials remains an important factor for organic solar cells. It was shown, that the electron acceptor (EA) in bulk-heterojunction solar cells can affect the stability of electron donor materials in different ways, significantly [1], [2]. The impact of the commonly used EA material PC[60]BM on the Photo-Degradation of the Low-Band-Gap Polymer (LGB) PCPDTBT, as well as its own degradation under irradiation of standard Air Mass 1.5 conditions are studied. The Photo-Degradation of the materials was observed using UV/VIS and FTIR transmission spectroscopy. Basically PCPDTBT exhibits an enhanced stability compared to its blend with PC[60]BM. In particular, IR spectroscopy allows the discussion of the influence of PC[60]BM on the stability of the LBG polymer PCPDTBT.

[1] A. Dupuis et al. Eur. Phys. J. Appl. Phys. 2011, 56, 34104

[2] A. Distler et al. Chem. Mater. 2012, 24, 4397